Marine vessel.



B. SETTERGREN.

Patented Apr. 19, 1910.

To all whom it may concern:

1 s AT s PATENT OFFICE.

IBEENHARD SETTERGREN, CHICAGO, ILLINOIS, ASSIGNOR TO JOHN GUBBINS, OF I CHICAGO, ILLINOIS.

I MARINE VESSEL.

v Specification of Letters Patent.

Renewed September 10,1909. .Serial No. 517,110.

Be it known that'I,'BnRNHARD SE'ITERGREBF, a citizen of the United States, and a resident of Chicago, in the-county ofCook and State of Illinois, have invented certain new and useful Improvements in Marine Vessels, of which the following is a full, clear, and exact'description.

My invention relates to improvements in marine navigation and its ob ect is to provide suitable means for assisting the propulsion of boats through the waterwhereby the friction caused by the hull of the boat as it cuts rapidly through the water is considerably reduced and the boat is permitted to ride more smoothly and rapidly than has heretofore been possible with vessels of ordinary construction.

In carrying out my invention it is expedient that the same be so arrangedthat a current of ainwill be forced from below the hull of the vessel in such manner that the greater portion of said hull will ride by said air-current, but which will become displaced from under 7 the hull at a point sufficiently forward of the propelling means so as not to interfere with the force thereof in the water or present any;v back pressure. This I accomplish by the means hereinafter fully described and as particularly pointed out in the claims.

In the drawings Figure 1 is a broadside View of a launch or other vessel showing my invention applied thereto. Fig. 2 is a deck View thereof. Fig. 3 is an amidship section drawn to alarger scale. Fig. 4' is a horizontal view of a portion of the bow taken below the water-line.

Referring to the drawings 1 represents-the deck and 2 the sides or hull of a marine vessel which in this instance is provided under the overhanging portion of its'stern with a suitable bladed propeller 3. Securedto' the outside of this. hull is a suitably shaped plate 4 that is separated "away from the same a slight distance by small spacingblocks 5 in order 'to provide asuitable airspaceor duct 6 between said plate and the hull of thervess'el. This plate 4 preferably corresponds in shape and outline -to the portion of the hull that it surrounds, that is, from a slight distance above the water line to the keel, and from the prow to between two-thirds and three-fourths of the length of the vessel. Superimposed upon this first itself through of the water through which the vessel travels rearward and the hull so the mentioned plate and preferably terminating at about amidship is another correspondingly shaped plate 7 that is separated there from by spacing-blockslO to space between the two plates. These plates conform in general shape to each other, and

Patented Apr. 19, 1919.

form an air at their forward ends rise above the horizontal plane of the top edge of said plates and extend up to the gunwales of the vessel to form breast-plates 8, as it were, across the bow thereof. These breast-plates are 1 each provided with a plurality of ports 9 for the ingress of air. The-upper edges'of these plates are preferably calked or else bent at an angle, substantially as shown, to prevent the air contained between the same from escaping above the line and also prevent the accidental inlet of water.

In operation, when the boat has been started the pressure of the air that forces the ports 9 and the suction siphons the air from between the plates 4 and 7 and the hull and'distributes it under the hull, thereby permitting-the bulk of the boat to rest upon these escaping bubblesof air that rapidly rise around the. sides thereof, but which become dissipated in the propeller. These air bubbles present less friction to the hull of the vessel than is the case when the boat is traveling in the solid -water, and, owing'to the speed at which the vessel 'is traveling andv the lightness of the air bubbles the same will leavethe rear ends of the plates and travel in a path that is upward around the sides of to the surface: of the water the propelling and steering Water before'they reach the rudder or the- V greater majority of'said bub-- I shellsforward, portion of which is provided with a series of shells forming air-spaces one within the other upon its exterior below the water-line. '3. A marine vessel having a series of shells forming air-spaces constructed one within the other on the outside of its hull and extending from line.

'the outside of the bow rearwardly to point its bow rearwardly to a point amidship below the water-line.

t. A marine vessel comprising a hull having a series of shells one within the other incasing its forward portion, said shells separated from each other and from said hull to forma series of enveloping air-spaces from which air is discharged rearwardly under the hull.

5. A marine vessel comprising a hull having a series ofshells one within the other incasing its forward portion, said shells separated from each other and from said hull to form a series of enveloping air-spaces from which air is discharged rearwardly under the hull, and said shells having airinlet ports in their bows above the water-line. 6. 3; marine vessel comprising a hull having a series of shells one within the other portion thereof beincasing the forward sai shells separated low the water-line, from each other and from said hull to form a series of enveloping air-spaces from which air is discharged rearwardly under the hull, and said shel'ls having air inlet-ports in their bows above the water- 7. A marine vessel comprising a hull the forward portion of which is provided with a series of air-spaces one within the other upon its exterior the inner one of which is longer than the outer. I

S. A marine vessel having a series of airspaces constructed one within the other on the outside of the the bow rearwardly to a point amidship the inner one of said shells being longer than the outer.

'9. A. marine vessel comprising a hull the forward portion of which is provided with a series of air-spaces one within the other upon its exterior below the water-line, the inner one of said shells being longer than the outer.

10. A marine vessel having a series of airspaces constructed one within the other on hull that extend from its amidship below the water-line, the inner one of said shells being longer than the outer. I

11. A marine vessel comprising a hull having a series of shells one within the other incasing the forward portion thereof the inner one of said shells being longer than the outer, said shells separated from each other and from'said hull to form a series of air-spaces from which air is discharged rearwardly under the hull.

-12. A marine vessel comprising a having a series of shells one hull the inner one than the outer, from each other hull and extending from within the other incasing the forward portion thereof of ,said shells being longer said shells being separated and from said hull to form a series of air-spaces from which air is dis vember, A.

charged rearwardly under the hull, and. said shells having air inlet-ports in their bows above the water-linen 13. A marine vessel comprisin a hull having a series of shells one wlthin the other incasing the forward portion thereof below the water-line the inner one of said shells being longer than the outer, said shells separated from each other and from said bull to form a series of air-spaces from which air is discharged rearwardly under the hull and said shells having air-inlet ports in their bows above the water-line.

14. A marine vessel comprising a having a series of shells one within the other incasing the forward portion of said hull below the water-line, the bow portions of said shells being increased in height to extend above the water-line, and said shells being spaced away from each other and from said hull to form air-spaces from which air is discharged rea'rwardly therefrom under the hull.

15. A marine vessel comprising a hull having a series of shells one within the other incasing the forward portion of said hull below the water-line the inner shell being longer than the outer,' the bow portions of said shells being increased in height to extend above the water-line, and said shells being spaced away from' each other and from said hull to form an air-space from which air is discharged rearwardly therefrom under the hull.

16. A marine vessel comprising a hull having a series of shells. one within the other incasing the forward portion of said hull below the water-line, the bow portions of said shells being extend above the water line and are pro vided with air inlet ports, and said shells being spaced away from each other and from said hull to form air-spaces from which air is discharged rearwardly therefrom under the hull.

17. A marine vessel comprising a hull having a series of shells one within the other incasing the forward portion of said hull below the water-line, being longer than the outer, the bow por-. tions of said shells being increased in height to extend above the water line and are provided with air inlet-ports, and said shells spaced away from each other and from said hull to form air-spaces from which air is %is1c1harged rearwardly therefrom under the In testimony whereof I have hereunto set my hand and seal this 23d day of No- BERNHARD SE'ITERGREN. [LS] Witnesses:

ERNST MA'rrERN, E. K. Lower.

increased in height to the inner shell 

